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Income Taxes (Narrative) (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
May 31, 2017 | Nov. 30, 2017 | Nov. 30, 2016 | Nov. 30, 2015 | Nov. 30, 2014
Operating Loss Carryforwards [Line Items] |  |  |  |  |
Income tax expense (benefit) |  | $ 28,170 | $ 20,446 | $ 21,155 |
Decrease in valuation allowance |  | 1,700 | 5,000 | 1,500 |
Cumulative undistributed foreign earnings |  | 13,800 |  |  |
Unrecognized tax benefits |  | 7,520 | 7,046 | $ 4,779 | $ 1,711
Deferred tax assets related to operating loss carryforwards, not recorded |  | 3,000 |  |  |
Interest and penalties recorded to provision for income taxes |  | 200 |  |  |
Accrued estimated interest and penalties |  | 500 | $ 300 |  |
Federal and Foreign [Member] |  |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |  |
Net operating loss carryforwards |  | 115,700 |  |  |
Indefinite-Lived Carryforwards [Member] |  |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |  |
Net operating loss carryforwards |  | 800 |  |  |
Tax credit carryforwards |  | 2,300 |  |  |
State [Member] |  |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |  |
Net operating loss carryforwards |  | 11,700 |  |  |
Tax credit carryforwards |  | 3,000 |  |  |
Federal [Member] |  |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |  |
Tax credit carryforwards |  | 800 |  |  |
Other Noncurrent Liabilities [Member] |  |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |  |
Unrecognized tax benefits |  | $ 4,500 |  |  |
Out of Period Tax Adjustment [Member] |  |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |  |
Income tax expense (benefit) | $ (2,700) |  |  |  |

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- Definition The amount of estimated penalties and interest accrued as of the balance sheet date arising from income tax examinations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319 + Details
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- Definition The sum of the amounts of estimated penalties and interest recognized in the period arising from income tax examinations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319 + Details
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